It is possible that you are looking at an abbreviated set of icons in the Application Drawer which holds a configurable subset of apps. You should not need to do a reset. All the apps and icons are in the device, you probably need to configure the Drawer to show you the ones you want to use (and de-clutter the ones you don’t!). It’s a bit like having 50 programs loaded onto your laptop, but only having 5 shortcut icons on your desktop.
I don’t know if the default setup for the Drawer includes the Route Planning app but it can be added to the Drawer (along with any other app) for easy access - see the excellent on-line GPSrChive resource
https://www.gpsrchive.com/Oregon%207x0/index.htm and scroll down to Application Drawer for details.